686412117 has 8 divisors (see below), whose sum is σ = 1016906880. Its totient is φ = 457608060.

The previous prime is 686412113. The next prime is 686412121. The reversal of 686412117 is 711214686.

It is a happy number.

686412117 is a `hidden beast` number, since 6 + 8 + 641 + 2 + 1 + 1 + 7 = 666.

686412117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (686412113) and next prime (686412121).

It is not a de Polignac number, because 686412117 - 2² = 686412113 is a prime.

It is a super-3 number, since 3×686412117³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686412113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12711309 + ... + 12711362.

It is an arithmetic number, because the mean of its divisors is an integer number (127113360).

Almost surely, 2^686412117 is an apocalyptic number.

It is an amenable number.

686412117 is a deficient number, since it is larger than the sum of its proper divisors (330494763).

686412117 is a wasteful number, since it uses less digits than its factorization.

686412117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25422680 (or 25422674 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 686412117 is about 26199.4678762757. The cubic root of 686412117 is about 882.1213100763.

It can be divided in two parts, 6864 and 12117, that added together give a palindrome (18981).

The spelling of 686412117 in words is "six hundred eighty-six million, four hundred twelve thousand, one hundred seventeen".